Houston, TX (SportsNetwork.com) - Sam Querrey advanced after Marinko Matosevic's retirement, and former world No. 1 Lleyton Hewitt fell to Go Soeda as the U.S. Men's Clay Court Championship commenced Monday at River Oaks Country Club.
Querrey, the No. 8 seed, was leading 4-1 in the first set when a foot injury caused Matosevic to retire after 18 minutes. Querrey was the runner-up in Houston in 2010.
Soeda defeated Hewitt, the winner of this event in 2009, 4-6, 7-6 (7-3), 6-3.
Also on Day 1, Argentine Federico Delbonis beat Lithuanian Ricardas Berankis 6-2, 7-6 (7-5) and Aussie Sam Groth stopped Dominican Victor Estrella Burgos 7-6 (7-3), 6-4.
This week's top seeds are Spaniards Feliciano Lopez and Roberto Bautista Agut. Lopez will open up against the aforementioned Groth.
Fernando Verdasco beat back-to-back runner-up Nicolas Almagro in last year's all-Spanish finale.
The winner of this tournament will receive $88,800.
Fox News First
Get all the stories you need-to-know from the most powerful name in news delivered first thing every morning to your inbox.
By entering your email and clicking the Subscribe button, you agree to the Fox News Privacy Policy and Terms of Use, and agree to receive content and promotional communications from Fox News. You understand that you can opt-out at any time.